... vocabularies and 300 useful sentences.Talking pen for the sound books "English i like"main functions:1. Point ... Maliang e-pen) 1. DIY sound sticker, parents can easy record their sound and make sticker, when they out ... their own voice to compare with the builtin standerd sound, it is very useful for children to learn ... 300 mah high capacity lithium battery. HOT!!! English Sound Book With Talking Pen